Random application flashing, stealing focus from other apps

This seems to happen at random, I can't tell what's triggering it, but it's persisted through multiple versions of Bazzite. It's happening right now as I type this.

If I press alt+space to bring up the quick launch bar, it appears for 0.1-2 seconds before vanishing, and when it does an application flashes in the task bar, a yellow circle with a big W.
It also breaks terminal usage on ghostty.

As I have Discord open, the application isn't flashing. However, if I switch to ghostty, suddenly it is flashing there again.

If I use the screenshot tool, the flashing icon becomes the screenshot tool icon. Every time it flashes, it breaks the focus in the screen capture tool (Say if I'm dragging the window, my cursor "loses grip").

This is really doing my nut in now, it's been happening for a few weeks. Can't see any clear culprit in btop, I've closed pretty much every process.

Unplugged my mouse and keyboard in case it was hardware related, not that either. The only fix is to do a hard restart.
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